Sudtirak Jakrawanachachat, Ploypailin Kijkasiwat, and Surachai Chancharat. “An Approximation Approach for Valuing Reverse Mortgages in Thailand”. KKU Research Journal (Graduate Studies) Humanities and Social Sciences, vol. 9, no. 1, Apr. 2021, pp. 10-16, https://so04.tci-thaijo.org/index.php/gskkuhs/article/view/223820.